"Gem Show" sounds like a single site, but the Tucson Gem, Mineral & Fossil Showcase happens all across town at more than 40 sites, from giant halls to hotels and sprawling camps of roadside exhibit tents. Almost all shows are free and open to the public.

For two weeks near the start of every year, Tucson becomes playground number one for the world of international gem and mineral trading, buying, bargains and bragging rights.